Burglar-alarm.



No.843,614 PATENTBD FBB.12,1907. G.`W.KUEN.

BURGLAR ALARM. APIjLIoATIoN FILED ooT.12.19o5.

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CHARLES W. KUEN, CF CHICAGO, ILLINOIS.

BU RG L'AR-ALARWI.

Specification of Letters Eatent.

Patented Feb. 12, 1907'.

Application iled'October 12,1905. Serial No. 282.461.

To @ZZ whom, t may con/cern.-

Be it known that I, CHARLES IN. KUEN, a citizen of the United States,residing at 3101 State street, in the city of Chicago, in' the county ofCook and State of Illinois, have in-l the parts with which the alarm isattached or connected are opened or moved.

The obj ect of my invention is to construct an alarm similar to a lockwhich while it can be opened and closed with a proper key when set roran alarm will explode a cartridge it' the parts are otherwise moved by awrong key or other instrument or by the opening of the structure towhich it is attached or'connected and that can be loaded or unloaded,set or unset, without removal from the place to which it is attached.

The manner in which I accomplish my object is explained in the followingspeciiications and illustrated in the accompanying drawings, in which-Figure l is a Jfront elevation of the alarm set for the explosion andsection or' latchplate and door-jamb. Fig. 2 is an inside view showingthe mechanism in position to make the alarm. Fig. 3 is an inside viewshowing the several parts in position after the alarm has been given.Fig. 4 is a right end view showing the back of the cartridgeholder. Fig.5 is a sectional view through the line 5 5, Fig. 2. Figs. 6, 7, 8, and 9are detail views of the eccentric mechanism.

Fig. l0 is a detail view of part of the side of.

the case, showing the beveled head of the latch projecting therefrom.

In the drawings the main body A and the back plate B form a case inwhich the mechanism is arranged. This case may be made of any suitablematerial and size. In this case is a sliding latch C, which is guided inits movements by a lug A', which projects trom the case, of which itforms a part, into an oblong slot C in the latch C. This latch isadapted to be moved by a key and by contact with the latch-plate on ythedoor-j amb. Pivotally attached to the latch by its stud C2 are twodouble-ended levers D, which are adapted to be moved by a key. The keyend D of these levers rest in an aperture C3 in the end of the latch, asshown in Figs. 2

.and 3. The trigger ends D2 of the levers are adapted to either engagethe trigger E or to ass through a slot E in the trigger when the eversand the latch are moved. The levers are heldin position to en age thetrigger by springs D3, which are hel in the head of the latch, and bythe lugs D4 on the levers. The trigger E, which is pivotally attached tothe case, has a shoulder E2, athumb-piece E3, and is controlled by thepressure of a spring E4. Adjacent to this trigger is a hammer F, havinga shaft F. One end of this shaft extends through the case and isprovided with a ring, as shown in Figs. l and 4. This hammer has a lipF2, which is adapted to engage the shoulder E2 of the trigger, arm F3,engaged by a spring F4, and a head F5, adapted to pierce the center of acartridge, as shown in Fig. 3.

In the back end of the case is a cartridgeholder G, having a barrel G',a pivotal stud G2, engaged in the case, and a lock-screw G3. The barrelG is adapted to hold a cartridge G4. An eccentric H is supported on ashaft H', which extends through the case and forms a handle H2, having apoint H3, adapted to be engaged in the depressions A2 in the case and.held therein under the pressure of a spring H4.

To load and set the alarm, the cartridgeholder is released by unscrewingthe lockscrew Gr3 .and swinging the cartridge-holder out and down to theposition shown by the dotted lines in Fig. '2. The cartridge is thenplaced in the barrel and the holder placed. back in position and securedby the lockscrew. In that position the head of the cartridge is pressedagainst the wall A5. The hammer is turned back by the aid of the ring inthe shaft till the lip passes the shoulder of the trigger, by which itis held. In Fig, 2 all the parts are shown in their normal positionsWhen set ready for the explosion of the cartridge, the handle H2 of theeccentric being in the position shown by the solid lines in Figs. 1 and5, in which position the eccentric H is out of contact with the leversD. lVith the parts thus set a movement oi the latch either by thesliding contact of the bevel-face of the head with `the strikingplate onthe jamb caused by the opening of the door or other structure on whichthe alarm is attached or by a wrong key or other instrument introducedinto the case through the keyhole A6, which fails to lift the levers IOOIIO

to the proper position and moves the latch inward, will force the end ofone or the other of the levers against the trigger and release thehammer which, actuated by the spring F4, strikes the cartridge in thecenter through the hole A7 in the wall A5, causing the cartridge toexplode. The wallA5 receives part of the shock of the explosion andprevents any part of' the cartridge from entering the case and cloggingthe parts therein. The extension of the wall below the keyhole alsoprevents the introduction into the case through the keyhole of anyinstrument or material to interfere with the action of the hammer. Witha proper key the levers and latch can be moved so that the ends of thelevers pass through the slot E" in the trigger without moving it. Whenit is desirable to set the alarm, so that the cartridge will be explodedby any inward movement of the latch, either by its contact with thestriking-plate, by the opening of the door, or by the insertion of theproper or an improper key, or by any other means, then in that case thehandle H2 of the eccentric H is turned toward the head of the latch, asshown by the dotted lines in Figs. l and 5. This brings the eccentric Hinto engagement with the levers D and holds the key ends D of the leversabove the reach of the key and moves the trigger ends D2 of the leversinto position to strike. the trigger E and to thereby release it fromthe hammer F and explode the cartridge.

Vhat I claim, and desire to secure by Letters Patent, is-

1. In a device of the kind described the combination of a caseconsisting of a main body and a back plate, said main body having aninterior wall adapted to engage and support the head of a cartridge 3with a latch slidable in said case and adapted to be moved therein by akey and by a strikinglate, a pair of double-ended levers pivotallysupported on said latch and movable therewith; a key insertible in saidcase adapted to move said latch and levers; an eccentric pivotallysupported in' said case and adapted to engage and raise said levers; aspring-pressed trigger pivotally supported in said case, said triggerbeing adapted to be engaged and moved by one or both of said levers 5 ahammer pivotally supported in said case, said hammer having aspring-pressed arm, a lip adapted to be engaged by said trigger and ahead adapted to strike and explode a cartridge; a cartridge-holderpivotally supported in said case and having a barrel adapted for thesupport of said cartridge in contact with said wall in said case andthereby adapted to be exploded by said hammer as described.

2. In a device of the kind described the combination of parts consistingof a main body and back plate forming a case; an interior wall in saidmain body, a latch supported in said case and slidable therein asdescribed; a double-ended lever pivotally supported on said latch; a keyadapted to move said lever and latch; an eccentric supported in saidcase adapted to be moved and to engage and raise said lever g aspring-pressed trigger pivotally supported in said case and adapted tobe moved by said lever g a hammer pivotally supported in said casehaving a spring-pressed arm, a lip adapted for engagement with saidtrigger and a head adapted to extend through said wall in said case andto thereby strike and explode a cartridge, a cartridge-holder pivotallysupported in said case adapted to hold said cartridge in contact withthe said wall in said case and thereby adapted to be exploded by saidhammer as described.

3. In a device of the kind described the combination consisting of acase having an interior wall 5 a latch slidably supported in said case;a plurality of double-ended levers pivotally supported on said latch; astrikingplate adapted to move said latch; a key adapted to move saidlevers and said latch a spring-pressed trigger supported in said caseadapted to be moved by one or more of said levers; a spring-pressedhammer pivoted in said case, said hammer having a lip adapted to beengaged by said trigger and a head adapted to strike a cartridge incontact with said wall in said case, a cartridge-holder pivotallysupported in said case and adapted to hold said cartridge in contactwith said wall.

4. In a device of the kind described, the combination comprising a casehaving an internal wall adapted to engage the head of a cartridge and toresist its movement when it is exploded in said case against said wall;a latch slidably supported in said case and a double-ended lever orlevers pivotally sup- IOO ported on said latch and movable with it,

said latch and lever or levers being adapted to be moved in said case bya striking-plate affixed on the frame of a door and adapted to engagesaid latch, and by a key insertible in said case, a striking-plate and akey as described; a spring-pressed trigger movable by said lever orlevers a spring-pressed hammer in said case adapted to be held andreleased by said trigger and to strike and explode a cartridge incontact with said wall in said case; means for holding a cartridgeagainst said wall, as and for the purposes described.

CHARLES W. KUEN. Witnesses:

THoMAs J. MORGAN, JOSEPH STAAB.

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